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<head>
    <meta charset="UTF-8">
    <title>块标签</title>
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      div：每一个 div 占满一行，块级标签
      span：文本信息默认在一行展示，行内标签 内联标签
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    <span>人生自古谁无死，</span>
    <span>留取丹心照汗青。</span>

    <hr>
    <div>人生自古谁无死，</div>
    <div>留取丹心照汗青。</div>

</body>
</html>